Poor system performance could be faulty reed valves. A hissing sound from the compressor immediately after shutdown indicates high side to low side pressure leakage. To check this, attach manifold gauges and turn compressor on. Readings showing lower than normal discharge pressures and high suction pressures or a rapid stabilization of gauge readings shortly after shutdown indicate leaking reed valves or head gasket.

While performing any service work on a vehicle always inspect the condenser's surface area. Dirt, bugs and any other debris will restrict air flow therefore reducing the condenser's ability to dissipate heat properly. It is recommended that on long haul trucks, off road equipment and agriculture machines that this be done on a regular monthly basis. Also be careful not to bend or damage the fins in the process of cleaning.

When replacing the clutch assembly always make sure to re-install the snap rings properly. Snap rings have two sides; one is flat and the other beveled. The beveled side should always go to the outside to ensure proper fit.

Always flush the A/C system to remove any contaminates and replaces any parts that cannot be flushed. It is also a good practice to use inline suction filters to help catch any foreign material.

When working with either PAG or Ester oils always be sure to keep the container capped when you’re not using. The chemical makeup of these types of oils will absorb moisture and can create a problem in the a/c system later.